Grinding machine



A. WILLIAMS GRINDING MACHINE File'd Feb. 26. 1923 3 sheets-sheet 1 l Q1N JV l\ n @l .I u; v" Nm 5 l, FL. 5| c .who

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Filed Flb. 26. 1923 3 Sinti-Cit 2 Oct. 27, 1925'. l 1,558,525

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Patented Oct. 27, 1925.

UNITED STATES PATENT OFFICE.

ARTHUR WILLIAMS, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO WILMARTI-I &MORMAN COMPANY, OF GRAND RAPIDS, MICHIGAN, A CORPORATION OF MICHIGAN.

GRINDING MACHINE.

Application filed February 26, 1923.

To all whom t may concern:

Be it known that I, ARTHUR WILLIAMS, a

citizen of the United States of America, re-

Kent and State of Michigan, have invented certain new and usefulImprovements in Grinding Machines; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

This invention relates to grinding machines and has especial referenceto grinding machines wherein a work holding table is reciprocated on asupporting guide structure beneath it by power normally in the operationof the machine, but which at times has to be moved through operation ofmechanism actuated manually. It is a primary object and purpose of thepresent invention to equip a grinding machine of this type with meansfor driving the table either by power or manually and to positively andautomatically disconnect the power drive paratively simple, durable inservice and practical in all respects. Manyl other objects and purposestogether with novel constructions for attaining the same will appearfully and in detail as understanding of the invention is had from thefollowing description,- taken in connection with the accompanyingdrawings, in which,

Fig. 1 is a fragmentary plan, with parts removed, broken away and shownin sec tion, of the grinding machine equipped with the invention,disclosure of which is made by saidremoval and breaking away of parts ofthe machine.-

Fig. 2 is a fragmentary vertical section taken substantially on theplane of line 2 2, of Fig. 1, vlooking in the direction indicated by thearrows.

Fig. 3 is a fragmentary transverse vertical section on the plane of line`3-3, of Fig. 1, looking inthe direction indicated, and

Figs. 4 and 5 are vertical sections on the planesof lines 4--4, and 5 5,of Fig. 3, looking as the arrows indicate.

tance below it.

A fur- Serial No. 621,259.

Like reference characters refer to like parts in the different figuresof the drawing.

The work carrying table 1 is mounted for sliding movements on suitablecarrying guides 2 which are relatively stationary and formed at theupper portion of the grinding machine, a horizontal apron 3 extending infront of the front guide and a. short dis The table carries a rack 4-lengthwise thereof and on its under side, with which a pinion 5 is inengagement. Pinion 5 together with a larger bevelled gear 6 locateddirectly below it is cast integral with a vertical sleeve 7, throughwhich a vertical shaft 8 passes and which is rotatably mounted in avertical supporting member 9. The lower end of the. sleeve rests on ashoulder made between the shaft 8 and an enlargement 8" thereof at itslower end, said shaft 8 being reduced in size at its upper vportion andreceiving a securing nut 10 at its upper end which is seated in a recessmade in the upper side of the pinion 5.

At the lower end of the enlargement 8l of shaft 8, a relatively largebevelled gear 11 is formed which is in mesh with another bevelled gear12 fastened to the rear side of a gear 13, in turn driven by a gear 14which may be power driven in any suitable manner, the usual and wellknown reversing mechanism used in machines of this type being interposedbetween the power source and the gear 14:. As it forms no part of thisinvention, the reverse mechanism is not shown or described. shaft 8 iscontinuously operated, with periodic reversals of Aits movementslwhenever the machine isin operation.

A clutch member 15 is yfixed at the lowerr end of the sleeve 7 and acoacting clutch member 16 is splined on the enlargement 8" of shaft 8below the clutch member 15 and is adapted to be moved into engagementwith said member 15, whereupon the sleeve 7 is driven with the shaft 8,and pinion 5 acting through rack 4c drives the table back and forth,reversing with the reversing of movement of themechanism, as is commonin grinding machines of this character.

`A bevelled pinion 17 is in mesh with the gear 6, being located at theend of a shaft 18 rotatably mounted in a suitable sup- It is evidentthat porting bracket 18 which projects from the rear vertical wall, atthe upper end of which one of the guides 2 for the table is located.

The end of the shaft 18 extends a short distance through this bracketand a clutch member 20 is fixed thereon. A second shaft 21, in axialalinement with. the shaft 18 is rotatably mounted in a second supportingbracket 22 paralleling the support 19, its outer end being equipped witha bevelled pinion 23 which is in mesh with another like pinion 241fastened to the inner end of a shaft 25 which extends to the front ofthe machine and has a hand wheel 26 at its outer end for manualoperation of the shaft 21 through the gearing connection therewithdescribed. A second clutch member` 27 is spined on the shaft 21, actingon which is a spring .28` normally tending to force the cluutch member27 into engagement with the clutch member 20. When the said clutchmembers are connected it is obvious that operation of the hand wheel 26serves to turn the binion 17 and that the table 1 may be. moved ineither direction in accordance with which way the wheel is turned.

A shaft 29, is located under the apron 3 and rotatably mounted insuitable journals depending therefrom, at its front end in front of theapron having an operating` handle 30. attached for manual operation. Anarm 31 is attached to the rod toward its inner end which extendsupwardly and laterally, having a pin 32 at its free end which passesbetween the clutch members 20 and 27, being designed to bear against themember 27 so as to move it away from thel member 2O,A when the shaft 29:is turned in. one direction. A second arm 33 is secured to the inner endof the shaft 29, ex-

tending laterally in the opposite direction from arm 31, at its endbeing forked to `connect with a pin 34 passing through the upper end ofa vertical rod 35 which is slidably mounted in a laterallyoff-set-portion 9n to, the part 9. At its lower end, rod carries a yoke3G. which is engaged with a collar 16 at the lower portion of the clutchmember 1G, it being evident that the clutch member is moved intoengaging' position with member 15 or away therefrom in accordance withthe vertical movements of the rod 315, and that such movements of therod 35, are controlled by the rotation of shaft 29., softhat when therod is moved upwardly to engage clutch member 16 with the member 15,there is a simultaneous movement of the arm 31 to cause pin 32 to act onthe clutch member 27, moving it out of engagement with the member 20.Accordingly, only one pair of the clutch members can be engaged at atime, the others being separated; and when the power drive operates thetable, the manually operable drive is. inoperative and when the manuallyoperable drive is operative, the power drive is disconnected.

An arm 37 extends from the shaft 29 just back of the down-turned frontportion of the apron 3, at its free end being formed into a shapesubstantially triangular in cross section, indicated at 3.8. A latchplug 39 is mounted ina suitable housing 40 formed on the dependingportion of the apron and is spring actuated to bear against the saidpart 33 of the arm, lying against one of the angular sides thereof whenthe shaft and attached arm are i-n one position and against the otherangular side when in the other position.v This forms a releasable latchmechanism for holding the shaft 29 in either of the positions to whichit may be operated and insures against detachment of the clutch memberswhich are in engagement until man-ual operation of the shaft with adesign to effect such disen gagement and engagement. of the other pairof clutch members.

The construction described is relatively simplel and is durable andpractical in all respects. The hand wheel 26 is insured against movementwhen the machine is in operation under the power drive and the powerdrive mechanism is insured of co1n-' plete separation from the tablewhen the same is to be operated manually, making the manual operationcomparatively easy. The appended claims define the invention and it isto be considered that all forms of structure coming within their scopeare comprehended by the invention.

I claim:

1. In a machine of the class described', a longitudinally movable table,supporting guides therefor, a rack connected to the table, a verticalsleeve rotatably mounted below the table, a. pinion at the upper end ofthe sleeve connected with the rack, a gear on the sleeve below thepinion, a clutch member fixed at the lower end'of the sleeve, a. movablymountedI clutch member adapted to connect with the first clutch member,a power operated mechanism connected with the movably mounted' clutchmember to drive the same., manually operable 1nechanism connected withthe gear on the sleeve and including: two additional clutch membersyadapted to be connected or disconnected., and/means for selectivelyconnecting either the first two clutch members andv disconnect the lastt-wo clutch members, or vice versa. substantially as described'.

2. In a machine ofthe class described, a longitudinally movable table,guid'e supports therefor a rack connected to the table, a verticalsleeverotatably mounted below the table a pinion at the upper end of thesleeve engaged with the rack, a clutch at the lower endof the sleeveincludinga member fixed to the. sleeve and a second' member movablymounted to move into or out of engagement with the first member, powerdriven mechanism with which the second clutch member is associated to bedriven continuously thereby, manually operable mechanism adapted to beconnected to or disconnected from the sleeve, and means to operate thesecond clutch member into engagement with the first clutch member andsimultaneously disconnect the manually operable mechanism from thesleeve, or vice versa, substantially as described.

3. In a machine of the class described, a longitudinally movable table,guide supports therefor, a rack connected to and positionedlongitudinally of the table, a vertical sleeve rotatably mounted underthe table, a pinion on the upper end of the sleeve engaging with therack, a gear on the sleeve below the pinion, a clutch member on thelower end of the sleeve, a shaft extending upwardly through the sleeve,a second clutch member splined on the shaft below theV first clutchmember, means for driving the shaft, a pinion in mesh with the gear, asecond shaft on which the last named pinion is fixed, a third clutchmember on the second shaft, a third shaft in alinement with the secondshaft, a fourth clutch member splined on the third shaft, means tomanually operate the third shaft, and manually operable means forsimultaneously operating the second and fourth clutch members, to movethe second member intov connection with the first clutch member and thefourth member away from the third member, or vice versa, substantiallyas described.

4:. In a machine of the class described, a longitudinally movable table,guide supports therefor, a rack connected to and positioned lengthwiseof the table, a vertical sleeve rotatably mounted under the table, apinion on the upper end of the sleeve engaging with the rack, a gear onthe sleeve below the pinion, a clutch member on the lower end of thesleeve, a shaft extending upwardly through the sleeve, a second clutchmember splined on the shaft below the first clutch member, power meansfor driving the shaft, second and third shafts rotatably mounted inalinement, a second pinion on one end of the second shaft engaging withthe gear on the sleeve, a third clutch member fixed on the opposite endof the second shaft, a fourth clutch member splined on the third shaft,a fourth shaft rotatably mounted and extending at right angles to thesecond and third shafts, means to manually turn the fourth shaft,separate means to manually turn the third shaft, and means on the fourthshaft operatively associated with the splined clutch members to move oneinto operation with its associated clutch member and simultaneously movethe other out of engagement with its associated clutch member,substantially as described.

In testimony whereof I affix my signature.

ARTHUR WILLIAMS.

